超简易Go语言实现的留言板代码 · golang

package main import ( // "fmt" "database/sql" "io" "log" "net/http" "text/template" "time" "github.com/ziutek/mymysql/godrv" ) // 留言结构 type Liuyan struct { Id int Name string Content string Time int } // 显示留言时间 func (l Liuyan) ShowTime() string { t := time.Unix(int64(l.Time), 0) return t.Format("2006-01-02 15:04:05") } func main() { godrv.Register("SET NAMES utf8") // 连接数据库 db, err := sql.Open("mymysql", "tcp:127.0.0.1:3306*go/root/123456") if err != nil { panic(err) } defer db.Close() // 准备模板 tpl, err := template.New("liuyanbook").Parse(html) if err != nil { panic(err) } // 显示留言页面 / requestList := func(w http.ResponseWriter, req *http.Request) { // 查询数据 rows, err := db.Query("select * from liuyan") if err != nil { log.Fatal(err) } defer rows.Close() // 获取数据 lys := []Liuyan{} for rows.Next() { ly := Liuyan{} err := rows.Scan(&ly.Id, &ly.Name, &ly.Content, &ly.Time) if nil != err { log.Fatal(err) } lys = append(lys, ly) } // 显示数据 err = tpl.ExecuteTemplate(w, "list", lys) if err != nil { log.Fatal(err) } } // 留言页面 /liuyan requestLiuyan := func(w http.ResponseWriter, req *http.Request) { err := req.ParseForm() if err != nil { log.Fatal(err) } if "POST" == req.Method { if len(req.Form["name"]) < 1 { io.WriteString(w, "参数错误!\n") return } if len(req.Form["content"]) < 1 { io.WriteString(w, "参数错误!\n") return } name := template.HTMLEscapeString(req.Form.Get("name")) content := template.HTMLEscapeString(req.Form.Get("content")) // sql语句 sql, err := db.Prepare("insert into liuyan(name, content, time) values(?, ?, ?)") if err != nil { log.Fatal(err) } defer sql.Close() // sql参数,并执行 _, err = sql.Exec(name, content, time.Now().Unix()) if err != nil { log.Fatal(err) } // 跳转 w.Header().Add("Location", "/") w.WriteHeader(302) // 提示信息 io.WriteString(w, "提交成功!\n") return } err = tpl.ExecuteTemplate(w, "liuyan", nil) if err != nil { log.Fatal(err) } } http.HandleFunc("/", requestList) http.HandleFunc("/liuyan", requestLiuyan) err = http.ListenAndServe(":12345", nil) if err != nil { log.Fatal("ListenAndServe: ", err) } } // 网页模板 var html string = `{{define "list"}}{{/* 留言列表页面 */}}<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <p><a href="/liuyan">给我留言</a></p> <table> {{range .}} <tr> <td>{{.Id}}</td><td>{{.Name}}</td><td>{{.Content}}</td><td>{{.ShowTime}}</td> </tr> {{end}} </table> </body> </html>{{end}} {{define "liuyan"}}{{/* 发布留言页面 */}}<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <form method="post"> 姓名:<input type="text" name="name" /><br> 内容:<input type="text" name="content" /><br> <input type="submit" value="提交" /> </form> </body> </html>{{end}}`